Atlas tcase??

[skipnrocks]

I am changing my drivetrain. I have an Atlas 4 speed and changing to a two speed. I have two questions.

I am going to an aluminum 6.2 with 6speed trans. It has a 4:1 first gear. I'm thinking of going to a 3.0 atlas. My figuring is I run a 4.3 for crawling now with a 2..7 first in my tranny. For crawling it should be about the same but with better trail speed for faster trails. My second thought was play it safe with a 3.8.

Second question. Prices for new are priced all over the board. Where is the best place. I'm open to used but not seeing any on any of the usual sites.

 

[Bebop]

Be careful there is different output shafts for the 6 speed autos.

Also, google tells me the first gear on these is 4.03 :1

Final drive depends on your axle ratio, but 3.8 seems very low to me. Even with a 3.0 atlas and a 6 speed you'll be lower than your current first gear with the 4.3 atlas.

 

[skipnrocks]

Be careful there is different output shafts for the 6 speed autos.

Also, google tells me the first gear on these is 4.03 :1

Final drive depends on your axle ratio, but 3.8 seems very low to me. Even with a 3.0 atlas and a 6 speed you'll be lower than your current first gear with the 4.3 atlas.

Do you mean on the outputs as far a spline count? or are there other factors?

 

[SkinnyPedalRacing]

Re: Re: Atlas tcase??

I am changing my drivetrain. I have an Atlas 4 speed and changing to a two speed. I have two questions.

I am going to an aluminum 6.2 with 6speed trans. It has a 4:1 first gear. I'm thinking of going to a 3.0 atlas. My figuring is I run a 4.3 for crawling now with a 2..7 first in my tranny. For crawling it should be about the same but with better trail speed for faster trails. My second thought was play it safe with a 3.8.

Second question. Prices for new are priced all over the board. Where is the best place. I'm open to used but not seeing any on any of the usual sites.

I have a 6.0, 6l80e, 3.0 atlas, with 4.88 gears going into my tj. It will wheel some and see street time as well. Let me know if you need help with an atlas.

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[skipnrocks]

pm sent

 

[redneckengineered]

Just buy one of every ratio and try them until you find the one you like.

 

[The-Boss]

http://www.grimmjeeper.com/gears.html

 

[skipnrocks]

thats a slick calculator

 

[poolman]

Just buy one of every ratio and try them until you find the one you like.

 

[SkinnyPedalRacing]

Replied sir

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[RustyC]

With the deep gearing of the 6l80. I would seriously consider an NP205. Not a huge expense if you decided to change later.
Not as bling as an Atlas but a great option.

 

[Jduck]

What axle ratio?

 

[skipnrocks]

What axle ratio?

5:13. With 43in stickies.

I thought of the 205. But didn't know if I could make it fit with how tight the space I have is. And there is a 3:1 kit for them I believe by low max if I wanted deeper gears. But the size is my main concern. Gearing wise it would be about under what I have now. 4.03:1 trans and 1.96 tcase with that vs current 2.43:1 and 4.3

 

[fl-krawler]

Do you mean on the outputs as far a spline count? or are there other factors?

They came in 32 and 34 spline output.

I think you will be happy with the 3.0.

 

[skipnrocks]

Re: Re: Atlas tcase??

They came in 32 and 34 spline output.

I think you will be happy with the 3.0.

That's good to know. Thank you!!

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[cbrjeeper]

I just did a complete swap like this and went 456 gear and a 3.8 atlas. All 32 spline input and out on mine.

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